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Author: Subject: At last the Threshershark in flight,once in a life time shot!
Ken Bondy
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[*] posted on 4-24-2012 at 10:45 AM


PS I've seen them jump freely several times at San Francisquito when dolphins and yellowfin tuna were around and I agree, the sight is unforgettable. And much better when there is no hook in their mouth. Excuse me now while I run for cover :)



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bacquito
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[*] posted on 4-24-2012 at 10:50 AM


Great photo, did the fisherman enjoy the meal?



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[*] posted on 4-24-2012 at 10:53 AM


Speaking of threshers, Ken,

Have you read anything why a shark would evolve to have such a huge tailfin. Is there some benefit,

I could research this on the net but if you know off the top of your head that would be best.

Of course we could speculate and that would be most enjoyable. It has to do with the hydrodynamics of pushing water, I bet.
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Ken Bondy
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[*] posted on 4-24-2012 at 11:12 AM


Igor all the shark experts I know say it must be related to water speed. The jumping ability comes from the water speed but is secondary. They are notoriously fast in the water and can chase down tuna, as this yellowfin discovered at San Francisquito:





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[*] posted on 4-24-2012 at 11:46 AM


I believe that mako's have a really prolonged tail and are considered to be one of the fastest fish in the ocean.

Remember "The Old Man and the Sea":

The first shark to show up is the mako. He kills it but there is a sense of respect. A brave fish. As he drifts closer to land the other sharks start on the marlin. For these he has nothing but contempt. Thieves and cowards. He fights back to complete exhaustion.
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Barry A.
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[*] posted on 4-24-2012 at 11:46 AM


-------is that the 'other half' hanging on the post, Ken??

(That had to be a big shark to make such a clean decap of that Tuna)

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[*] posted on 4-24-2012 at 12:32 PM


Igor the tail of a Mako looks just like GWS,caught a number of Makos,its said that the fastest is the Sailfish but the Mako is right there.

I,ve caught several Mako,a great jumper also and a speed burner but nasty, this picture is the first Mako if you look closely the side of his head is missing we had him alongside when this big brute came up and tried to eat my fish:o.

Caught any number of grinner's on my old 16' Ryan,fished for sharks for many years and found it to be a enjoyable pastime. We always bought home the Mako and T-Sharks.




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Ken Bondy
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[*] posted on 4-24-2012 at 12:58 PM


Quote:
Originally posted by Barry A.
-------is that the 'other half' hanging on the post, Ken??

(That had to be a big shark to make such a clean decap of that Tuna)

Barry


No Barry, we never saw the other half, we are pretty sure it went into the shark :) We were working a big school of yellowfin below dolphins, and there were a lot of big threshers jumping. My son (in the picture) had a good hookup, when the line suddenly went slack and he reeled in the severed front half of the fish. We always assumed it was a thresher that took the yellowfin, they were there in good numbers and I don't know of any other animal big enough and fast enough to do that.




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[*] posted on 4-24-2012 at 12:59 PM


Only sharks , other than little dinks, I've ever caught/hooked were bull sharks and hammer heads. Those big hammer heads are tough critters.:yes:
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[*] posted on 4-24-2012 at 01:17 PM


Apparently the tail is also used to imobilize prey:

Thresher sharks use their huge tails to pursue and immobilise their prey during feeding, confirms a recent study based on video evidence.

The results of this study by Scott Aalbers, Diego Bernal and Chugey Sepulveda are published in a recent issue of the Journal of Fish Biology.

It has long been suspected that the very long caudal fins of thresher sharks (Alopias spp.) are not only used for generating thrust during swimming, but also have a role to play in feeding, as evidenced by the frequent hooking of thresher sharks in the tail using long-line gear.

The authors towed an underwater video camera behind a boat in the nearshore waters of southern California. Two lines baited with live chub mackerel (Scomber japonicus) were towed behind the rearwards-facing camera and situated almost directly in front of the camera lens.

Over 27 days, the authors collected 650 minutes of digital video that included footage from 33 individual common thresher sharks (Alopias vulpinus).

The authors observed 14 of these 33 sharks attempting to strike the bait with their tails, successfully hitting them 65% of the time.

The sharks used two methods to achieve the strike: in the first method, they rapidly surged forward, undulating their bodies. This created a backwards-moving wave down their bodies that ended with a flick of the tail (this was the predominant method observed 17 times with a success rate of 47%).

The second method had the shark swimming next to the bait and striking it with a lateral flick of the tail (this was observed 12 times with a success rate of 92%).

For more information, see the paper: Aalbers, SA, D Bernal and CA Sepulveda (2010) The functional role of the caudal fin in the feeding ecology of the common thresher shark Alopias vulpinus. Journal of Fish Biology 76, pp. 1863–1868
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[*] posted on 4-24-2012 at 01:24 PM


Quote:
Originally posted by Skipjack Joe

All in all a pity. He could have cut the line at the end.

A 2nd rate fisherman. One who places his own pleasure over the health of a species. He must have known the plight of the sharks. Make that a 3rd rate fisherman.

Thumbs up for the experience. Thumbs down for the fisherman.


[Edited on 4-24-2012 by Skipjack Joe]
I have to disagree with you, theres nothing wrong with catching and keeping a little food for the table. People seem to tweek about sharks and marlin etc.... but you can't just take the other species and no predator fish if you we did the imbalance would not be healthy either. It's not like he killed more than he could consume, important point "more than needed for consumption". So I say bravo, first class fisherman and fish.
Commercials that just kill because they are bycatch thats the ones that need to reprimanded and kicked of the water for their reprehensible waste of the environment.




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Ken Bondy
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[*] posted on 4-24-2012 at 01:40 PM


Igor, baitcast is right, the mako tail is symmetrical and looks a lot like the white. Here's the only mako I have ever seen underwater. Sorry for the poor image but it happened very fast:





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[*] posted on 4-24-2012 at 01:52 PM


Ever see a school of Spinner Sharks moving through an area? Real spooky.:yes:
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[*] posted on 4-24-2012 at 03:57 PM


Speaking of sharks does anyone know that Hammerheads visit Southern Calif. from time to time they do unlike the Cortez where they are very common as well as Six and sevengill and Soupfin visit the beachs as well.

The picture is a Hammer I won a Seal Bch shark and ray derby from the Seal Bch jetty of all places,late afternoon,the first long run was straight out thru a bunch of sufers you should have seen them scatter,a long time ago!
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Anyone can catch fish in a boat but only \"El Pescador Grande\" can get them from the beach.

I hope when my time comes the old man will let me bring my rod and the water will be warm and clear.
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[*] posted on 4-24-2012 at 05:06 PM


Here's a pic of a mako that hit a wahoo lure on the tuna banks outside Mag Bay a couple of years ago:

mako.jpg - 40kB
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[*] posted on 4-24-2012 at 05:10 PM


And a hammerhead that took a mackerel intended for a yellowtail a couple of weeks ago:

The mako came aboard for removal of the hook on a $40 lure.
The hammerhead was hooked on a circle hook on mono. After the photo op, I took a couple of wraps on the leader and broke it at the knot, leaving the circle hook as a souvenir in the corner of the hammerhead's mouth.
Both were sent on their way.

[Edited on 4-25-2012 by bill erhardt]

[Edited on 4-25-2012 by bill erhardt]

thresher.jpg - 34kB
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[*] posted on 4-24-2012 at 05:26 PM


Quote:
Originally posted by Bajajorge
Now I know why I don't swim in the ocean. To much stuff in there that can kill ya.


have you ever walked thru the inner city neighborhoods?




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[*] posted on 4-24-2012 at 05:33 PM


Bill how did you deal with that nasty,here is my picture of the hammerhead at Seal Bch.

Imagine that dorsal going right thru those surfers.

[Edited on 4-25-2012 by baitcast]




Anyone can catch fish in a boat but only \"El Pescador Grande\" can get them from the beach.

I hope when my time comes the old man will let me bring my rod and the water will be warm and clear.
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Ken Bondy
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[*] posted on 4-24-2012 at 05:44 PM


My preferred view of a hammerhead :)





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[*] posted on 4-24-2012 at 05:44 PM


well thats real nice bill. I can only assume you must be some kind of mindless senseless murderer. did you stop for a minute and think about putting this innocent mackeral (chloroscombrus chrysurus ) in harms way? I bet not! you know, the world conservation union(ICUN) list this magnificent creature on the almost vulnerable to maybe vulnerable to could be vulnerable list. obviously sir you have never been witness to the marvel of this majestic fish leaping out of the water chasing down the wily and elusive anchovie( engraulidae). bill I wish you could swim with these beautiful, intelligent, and all around nice guy of the fish world. how do you sleep at night?
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